Planer-tool holder.



W. S. ROBINSON.

PLANER TOOL HOLDER.

APPLICATION FILED DEC. 26I I916.

mmmmv Patented Jan. 1,1918.

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. of whichlthe following is'aspecification.

. This inve tion relates to planer tools and its object is to provide animproved tool holder wherein short length cutters: may be adj'ustablysecured. Q

A further object of this'invention is to provide an offset supportingshank for tlie' cutting-tool holder Qwhereby; the. point of support" ofthe .cutftmg tool will lie approximatelyrin'the .axis' of the supportingshank. 1 of the drawings is aside eleva- Figure.

tional viewfof a supporting shanlgjthe cuttakenon'line H of ting toolholder, and a cutting tool, a p01?v tion of he shank being broken away,F'1 g.

2 is aliorizontal section takenon line 2 2 front elevatlonal vlew ofFig.1. Fig. 3 is a of the holder, Fig. llis a sectional view I .Iiigfl-LFig. 5.is a perspective View of anoilset supporting shank, a portionthereof beingbreken away.

Fig. 6 is a side elevational viewof the oilset.

supporting shank shown Fig. 5. to which the tool holder has beenattached.

In the accompanying drawings, 1 is a supporting bar o A preferablycircular base member 2 is slidable upon the shank l and is rigidlysecured thereto by a split socket or clamp consisting of 3 andan endwall '3 'forme'd integral with the base member, said jaws being arrangedto be drawn together by a clamping screw 4 extending through two ears8". One of said ears is integralwith oneend or oneofthej side walls3,"the other ear being integral 31- l I i i a rn'r ore.

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- Specification of Letters Tatent, A pplicati'oniileiiDecentbe126 ,1316. Serial no. ream-35. 1 Q

. Fig. 1. v The cutting r shank] of rectangular; cross section which isadapted to be suitably se cured'to theltool carriage ofqa planer or simila'r machine.

two opposite side walls.

Patentedlanli ifiifi,

Any, silltablelmeans, may pivotally securethe to gu'e intheslottedportion, 6. The clappertongue is-preferably arcuately ronndedfor beveled'op'p osite thepivotz'l support as show-n; atw-lO 1n 7 tool '8 isadjustablysecured in a tool slot 1,1 by anysu-itable means,

that herein shown beingaset screw The means per tongue 1n the-(positionshown nrFigl 1 comprises a l ea f s prin 13 secured to; the

clappenbox 5-.by:one or more screwsll and for normally holding theclap-,.

a pin, 15 carriedgby the clapper tongue 7 Upon the non-cutting orreturnstroke, the

spring 123 yieldstoi 'allow the tongue to turn upon ts p votasflthe tooldrags over the work. Upcn the forward or base 2 is as follows:.A centralpivot member 17 axially carried the baseportion of the. rotatably seatedin a: central 18 inthei-b ase member 2', In the.

clapper box is open ng base member and. concentric w1th the centralopening is an annular 'T-slot19 .openingupon the faceadjacent theclapper box.

Through a suitably shaped hole 20 is inserti ble a T -bolt I 21 orpreferably two. .T-bolts, 7 head 22 adapted 'to; underlie the walls 230ithe T-slot 19. The

each having a flanged force, applied by the machine 7 to abut againstthe.

cutting stroke the force applied bythe spring 13 and later.

p for adjustably and-rotatably securing the clapper box structurev 5. tothe head s22 of the bolts are of-any desired'shape to slidably andnon-,rotatably secure each bolt in the T-slot, The basezportion oiitheclapp'erQbox 5 hastheboltholesil l through,

which the bolts 21 are adapted to structure 5 is in this manner rigidlyand adjustablysecured to the base member 2.

In Fig. 5, I have shown'a supporting bar or shank. 27 having'anintermediate transverse portion 28 and an offset portion 29;

be passed. lVashers 2'5 and-nuts26 are mountedonrthe':

outer ends of thebolts; The clapper box- When the circular tool holder 5and the base member 2 are secured upon the ofiset portion, the point ofsupport of the cutting tool will lie approximately in the axis of thebar. If desired, the intermediate portion of the bar may be cut away toprovide an, arcuate surface 30 as indicated in Fig. 5 to accommodate theupper portion of the base 2 and clapper box 6. From the foregoing itwill be seen that the base member 2 may be securely clamped to thesupporting bar at any point, thereby roughly adjusting the tool. Theclapper box structure may be rotatably adjusted upon the base and thenrigidly secured thereto, thereby adjusting the tool to the desiredangle. The cutting tool is thereupon adjusted in the tool slot of theclapper tongue and rigidly secured by the set screws thereon for takingthe desired depth'of out. It is apparent that, with the foregoingdescribed improved tool holder, long-shanked planer tools and specialside tools are unnecessary and short-length cutters may be employed moreefliciently than in prior structures.

While I have described in considerable detail the preferred embodimentof my invention, I would have it understood that I will be limited onlyby the appended claims.

I claim as my invention: 1. A tool-holder having, in combination, asupporting shank; a base member slidable thereon and adapted to berigidly secured thereto, said base member having a central opening, anannular T-slot concentric with said opening, and an insertholecommunificating with said T-slot; securing means comprising a pairof clamping jaws rigid with said base member and a clamping screw ;'aclapper box structure comprising a base portion having a transverse slottherein and a hole extending through the base portion and communicatingwith said T-s lot, a central pivot rigid with said base portion andseated in said central opening, and a clapper tongue tool-holderpivotally mounted in said transverse slot comprising a body portionhaving a tool slot, a rounded end portion opposite said pivotalmounting, and means for securing a tool in said tool slot; and means forrigidly securing said clapper box structure to said base membercomprising a T-bolt insertible through said insert hole and having aflanged head adapted to underlie the walls of said T-slot and a bodyportion insertible through-said communicating hole and means forsecuring said bolt in said communicating hole.

A tool-holder having, a supporting shank, a base thereon and adapted tobe thereto, securing means comprising clamping jaws rigid with saidmember and a clamping screw, and a clapper box structure comprising abase portion rotatably adjustable upon and rigidly secured to said basemember and having a slot therein and a clapper tongue tool-holder ed insaid slot, said clapper tongue having an arcuately rounded end portionand a tool slot, Y

3. A tool-holder having, in combination, a supporting shank having anoffset portion, a base member slidable thereon and adapted to'be rigidlysecured thereto, and a clapper box tool-holder rotatably adjustable uponand rigidly secured 'tosaid base member,

in combination, member slidable rigidly secured pivotally mountthe pointof support of the tool lying approximately in the axis of the supportingshank.

4. A tool-holder having, in combination, a supporting shank having anintermediate transverse portion having an arcuate surface andan offsetportion, a circular base member slidable thereon and adapted tobe'rigidly secured thereto, and a circular clapper b'ox tool-holderrotatably adjustable upon and rigidly secured to said base member, thepoint of support of the tool lying approximately in the axis ofthesupp'orting shank, the circular base member abutt'inga'gainst saidarcuate surface. I

5. A tool-holder having, in combination, a rectangular shank, arectangular socket member having'inclosing walls adapted to surround theshank, said socket member being split at one corner, ears on the socketmember at opposite sides of the split, and a clamping screw for drawingthe ears together and thus drawing all of the walls of the socket memberinto engagement with the shank to secure the socket-member in, adjustedposition. I

In testimony whereof, I have hereunto set my hand.

WILLIAM S. ROBINSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner oflatentgfi Washington; DC. i

